//
//  WHWebViewController.m
//  YLFinanceService
//
//  Created by she1323 on 2017/12/26.
//  Copyright © 2017年 she1323. All rights reserved.
//

#import "WHWebViewController.h"
#import <WebKit/WebKit.h>
#import <Masonry.h>

@interface WHWebViewController ()<WKUIDelegate,WKNavigationDelegate>
@property (nonatomic, weak) UIProgressView *progressView;
@property (nonatomic, weak) WKWebView *wkWebView;

@end

@implementation WHWebViewController

- (void)sure
{
    [self dismissViewControllerAnimated:YES completion:nil];
}

- (void)viewDidLoad {
    [super viewDidLoad];
    
    if (_showClose == YES) {
        self.navigationItem.rightBarButtonItem = [[UIBarButtonItem alloc] initWithTitle:@"确认" style:UIBarButtonItemStylePlain target:self action:@selector(sure)];
    }
    
    
    self.view.backgroundColor = [UIColor whiteColor];
    UIProgressView *progressView = [[UIProgressView alloc] initWithFrame:CGRectMake(0, 44, [[UIScreen mainScreen] bounds].size.width, 2)];
    _progressView = progressView;
    self.progressView.progressTintColor = [UIColor redColor];
    //设置进度条的高度，下面这句代码表示进度条的宽度变为原来的1倍，高度变为原来的1.5倍.
    self.progressView.transform = CGAffineTransformMakeScale(1.0f, 1.5f);
    [self.navigationController.navigationBar addSubview:self.progressView];
    
    
    WKWebView *webView = [[WKWebView alloc] initWithFrame:CGRectZero];
    webView.UIDelegate = self;
    webView.navigationDelegate = self;
    _wkWebView = webView;
    [webView addObserver:self forKeyPath:@"estimatedProgress" options:NSKeyValueObservingOptionNew context:nil];
    [webView loadRequest:[NSURLRequest requestWithURL:[NSURL URLWithString:self.url]]];
    [self.view addSubview:webView];
    __weak typeof(self) weakSelf = self;
    [webView mas_makeConstraints:^(MASConstraintMaker *make) {
        make.top.right.bottom.left.mas_equalTo(weakSelf.view);
    }];
    
    
    // Do any additional setup after loading the view.
}

- (void)observeValueForKeyPath:(NSString *)keyPath ofObject:(id)object change:(NSDictionary<NSString *,id> *)change context:(void *)context {
    
    
    if ([keyPath isEqualToString:@"estimatedProgress"]) {
        self.progressView.progress = self.wkWebView.estimatedProgress;
        if (self.progressView.progress == 1) {
            /*
             *添加一个简单的动画，将progressView的Height变为1.4倍，在开始加载网页的代理中会恢复为1.5倍
             *动画时长0.25s，延时0.3s后开始动画
             *动画结束后将progressView隐藏
             */
            __weak typeof (self)weakSelf = self;
            [UIView animateWithDuration:0.25f delay:0.3f options:UIViewAnimationOptionCurveEaseOut animations:^{
                weakSelf.progressView.transform = CGAffineTransformMakeScale(1.0f, 1.4f);
            } completion:^(BOOL finished) {
                weakSelf.progressView.hidden = YES;
                
            }];
        }
    }else{
        [super observeValueForKeyPath:keyPath ofObject:object change:change context:context];
    }
}

- (void)viewWillDisappear:(BOOL)animated
{
    [super viewWillDisappear:animated];
    [_progressView removeFromSuperview];
}

//开始加载
- (void)webView:(WKWebView *)webView didStartProvisionalNavigation:(WKNavigation *)navigation {
    //NSLog(@"开始加载网页");
    //开始加载网页时展示出progressView
    self.progressView.hidden = NO;
    //开始加载网页的时候将progressView的Height恢复为1.5倍
    self.progressView.transform = CGAffineTransformMakeScale(1.0f, 1.5f);
    //防止progressView被网页挡住
    [self.view bringSubviewToFront:self.progressView];
}

//加载完成
- (void)webView:(WKWebView *)webView didFinishNavigation:(WKNavigation *)navigation {
    //  NSLog(@"加载完成");
    //加载完成后隐藏progressView
    self.progressView.hidden = YES;
    self.title =  webView.title;
    //  self.title = [webView stringByEvaluatingJavaScriptFromString:@"document.title"];
    
}

//加载失败
- (void)webView:(WKWebView *)webView didFailProvisionalNavigation:(WKNavigation *)navigation withError:(NSError *)error {
    //  NSLog(@"加载失败");
    //加载失败同样需要隐藏progressView
    self.progressView.hidden = YES;
}

- (void)dealloc {
    [self.wkWebView removeObserver:self forKeyPath:@"estimatedProgress"];
}


- (void)didReceiveMemoryWarning {
    [super didReceiveMemoryWarning];
    // Dispose of any resources that can be recreated.
}

@end
